package qingke.chat;

import java.io.IOException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Servlet implementation class LoginServlet
 */
@WebServlet("/LoginServlet")
public class LoginServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public LoginServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
//		List<String> usernames = (List<String>)request.getServletContext().getAttribute("usernameList");
//		if(usernames ==null){
//			usernames = new ArrayList<String>();
//			System.out.println("user name list is null, init");
//		}
//		System.out.println("username list size = " + usernames.size());
//		String user = request.getParameter("username");
//		if(user == null){
//			user="";
//		}
//		System.out.println("received username is "+user);
//		usernames.add(user);
//		request.getServletContext().setAttribute("usernameList", usernames);
//		response.getWriter().append("Done");
		response.setCharacterEncoding("UTF-8");
		List<String> usernames = 
				(List<String>)request.getServletContext().getAttribute("usernameList");
		if (usernames == null) {
			usernames = new ArrayList<String>();
			System.out.println("user name list is null, init");
		}
		System.out.println("username list size = " + usernames.size());
		String user = request.getParameter("username");
		String password = request.getParameter("password");
		if(user == null) {
			user = "";
		}
		System.out.println("received username is " + user);
		if(password.contains("tiancai")){
			
			usernames.add(user);
			request.getServletContext().setAttribute("usernameList", usernames);
			//response.getWriter().append("Done");//.append(request.getContextPath());
			user = URLEncoder.encode(user, "utf-8");
			Cookie cookie = new Cookie("loginuser", user);
			//cookie.set
			
			response.addCookie(cookie);
			response.sendRedirect("chat.html");
		}else{
			response.sendRedirect("new.html");
		}
		
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		doGet(request, response);
	}

}
